@openpresentation/opf-editor 0.24.3

• RR-98: @openpresentation/opf-editor/presenter adds createPresenter (full screen through the Fullscreen API with a fixed-overlay fallback, slides drawn with the canvas's renderer, fonts handle and catalogs and letterboxed on black, the neighbors drawn ahead; Right, Space, PageDown, Enter, Left, PageUp, Backspace, Home, End, Esc, click zones and touch swipes; hidden slides skipped as the exports skip them; a "03 / 12" counter on pointer move; onExit(index) and onSlideChange(index); role="dialog", a focus trap and an aria-live announcement), createPresentButton (an icon-only "Present" button, title "Present (F5)", styled like the Export trigger) and bindPresentShortcut (F5, ignored while typing). @openpresentation/opf-editor/read-deck-file adds readDeckFile(file | { name, text }) (JSON, YAML or Markdown by extension, with fallbacks, through core's fromYaml and fromMarkdown; returns { document, format, name, findings } and throws a typed DeckFileError) and DECK_FILE_ACCEPT for <input accept>. The example playground has a Present button next to Export, and its Import file tab and drop zone read .yaml, .yml and .md through readDeckFile. The styles are src/styles/presenter.css, in styles.css.